When coconut water made its big break into the market a decade ago, it was hailed for its ability to fight viruses, combat aging, prevent cancer, and stave off kidney disease and other ailments.

But since its growth in popularity, marketers have scaled back on these claims.

Vita Coco, one of the biggest brands, once declared that it had 15 times more electrolytes than sports drinks like Gatorade and Powerade, without the nefarious added sugar.

Sounds great, right?

Not so fast. In 2011, a class-action lawsuit argued that the nutritional info on Vita Coco's packaging exaggerated the mineral content of the beverage. As part of the settlement, the company agreed to cease its claims that its product hydrates better than sports drinks.

That's not to say coconut water doesn't contain plenty of minerals, but the same amounts are found in plenty of other foods. An average container of coconut water contains 660 milligrams of potassium. White beans have 561 milligrams; a banana has 422.

Lesson learned: If it sounds too good to be true, it probably is.

And anyway, we're sure the next big miracle juice is right around the corner.